Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2021   18:25:58   (   0.04, -75.22) (  -0.08, -75.66)   50.10                80
 04/16/2021   18:09:54   (   0.04, -75.23) (   0.97, -71.13)  467.41                80
 04/18/2021   06:31:40   (  -0.03, -75.25) (   0.24, -76.39)  130.64                80
 04/19/2021   06:10:16   (  -0.03, -75.25) (  -0.82, -71.87)  386.84                80
 04/20/2021   18:32:11   (   0.02, -75.26) (  -0.40, -77.16)  216.18                80
 04/21/2021   18:16:06   (   0.02, -75.27) (   0.60, -72.62)  301.84                80
 04/23/2021   06:37:53   (  -0.02, -75.30) (   0.55, -77.89)  294.98                80
 04/24/2021   06:16:27   (  -0.02, -75.32) (  -0.44, -73.36)  223.15                80
 04/25/2021   18:38:24   (   0.01, -75.33) (  -0.70, -78.66)  379.25                80
 04/26/2021   18:22:18   (   0.02, -75.35) (   0.29, -74.13)  139.33                80